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Problems in Mathematical Analysis.pdf - pwp.net.ipl.pt

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Sec. 2]_Functional Series_307<br />

[the number # also belongs to the <strong>in</strong>terval of convergence of. the series (3)J.<br />

Here, the series (6) and (7) have the same <strong>in</strong>terval of convergence<br />

series (3).<br />

F<strong>in</strong>d the region of convergence<br />

2510.<br />

2511. (-D-'. 25.9.<br />

n - 1<br />

2512. ( l)" +I<br />

-jb- 252 -<br />

M = n<br />

I<br />

of the series:<br />

n - 1<br />

2-(jzrk-<br />

n-i<br />

00 3D<br />

v~^ s<strong>in</strong> (9n M x v^ 2/1-4- 1<br />

O(T O ^'*' *<br />

I<br />

| ^'oMI^fl l^A- O^vQI ><br />

n = i<br />

2514. X 2 " s<strong>in</strong> -J-<br />

2522 -<br />

ri = o<br />

25.5**. X^i. 2523. V ^ .<br />

/l = /I=l X<br />

2516. (-l)" fI *- nMn *. 2524*.<br />

2517. 2-p- 2525.<br />

nr<br />

= i<br />

as the<br />

F<strong>in</strong>d the <strong>in</strong>terval of convergence of the power series and test<br />

the convergence at the end-po<strong>in</strong>ts of the <strong>in</strong>terval of convergence:<br />

30<br />

^ y<strong>in</strong> I<br />

2528. X 2^rr.<br />

n - 1<br />

2531.<br />

2532.<br />

2533.<br />

2529. . 2534.<br />

n=i<br />

'<br />

2530. -_^". 2535.

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